DEVELOPMENT OF THE SCIENTIFIC AND TECHNICAL BASIS FOR INTEGRATED AMORPHOUS SILICON MODULES. CONTRIBUTION BY CIEMAT-IER

DEVELOPMENT OF THE SCIENTIFIC AND TECHNICAL BASIS FOR INTEGRATED AMORPHOUS SILICON MODULES. CONTRIBUTION BY CIEMAT-IER

Dal 1986-08-01
al 1989-03-31

Dettagli del progetto

Costo totale:

Non disponibile

Contributo UE:

Non disponibile

Coordinato in:

Spain

Argomento (i):

Meccanismo di finanziamento:

CSC - Cost-sharing contracts

Obiettivo

A STAND ALONE PV SYSTEM WILL BE USED TO POWER AN ISOLATED OUT-OF-THE-GRID MILK DAIRY (48 CATTLE) LOCATED AT POZOBLANCO (37.88 N, CORDOBA, ESPANA). THIS RESAERCH PROJECT INCLUDES THE FOLLOWING MAIN TASKS, WHICH ARE PRESENTLY UNDER STUDY:

UNDER TASK 1) A COMPLETE LOAD PROFILE STUDY HAS BEEN CARRIED OUT. THE MAIN ELECTRICAL LOADS TO BE POWERED ARE THE MILKING AND COOLING AC MOTORS (220V, 30, 4.5 KW). MILKING IS MADE TWICE PER DAY, IN THE MORNING FROM 8:00 AM TO 11:00 AM, AND IN THE EVENING FROM 6:00 PM TO 9:00 PM. DURING THE FIRST 90 MINUTES OR EACH MILKING CYCLE, BOTH THE MILKING MOTOR (DEPRESSOR, 1,5 KW) AND THE COOLING MOTOR (COMPRESSOR, 2,9 KW) ARE WORKING, WHILE THE LAST 90 MINUTES OF EACH CYCLE, ONLY THE COOLING MOTOR REMAINS ON. THEREFORE, A MORELESS CONSTANT DAILY LOAD OF MORE OR LESS 22.1 KWH/DAY IS DEMANDED ALL OVER THE YEAR.

OUT OF THE MILKING TIME, THE ONLY DEMAND ARE THE SMALL AC MOTORS: ELCTRIC FAN AND MILK SHAKER, INCLUDED IN THE BULK MILK TANK (2.000 1), PLUS THE DATA MONITORING SYSTEM, PUBLIC AND DOMESTING LIGHTING AND THE WATER PUMPS, TOTALIZING AND ELECTRIC DEMAND OF MORE OR LESS 2 KWH/DAY. THE AVERAGE WINTER IRRADIATION LEVEL AT THE LOCATION SITE IS MORE OR LESS 3.38 KWH/DAY.

THE TECHNICAL SPECIFICATION OF THE MAIN SUBSYSTEMS ARE ANALYSED IN TASK 1) AS FOLLOWS: PV MODULES, 47 WP EACH. V-I CURVES AS AFUNCTION OF BOTH TEMPERATURE AND IRRADIATION LEVELS. METEOROLOGICAL DATA: SUN POSITION (AZIMUT, HEIGHT) AS AFUNCTION OF GEOGRAPHICAL COORDINATES. AVERAGE MONTHLY TEMPERATURES. CLIMATOLOGICAL DATA. TILTED AND HORIZONTAL IRRADIATION DATA. BATTERY CAPACITY AT DIFFERENT DISCHARGE RATES. INVERTER EFFICIENCY AT DIFFERENT LOADS AND SELF-CONSUMPTION.

UNDER TASK 2) THE ACTUAL COMPONENT CHARACTERISTICS, INCLUDING THE DATA MONITORING SYSTEM WILL BE TESTED AND EVALUATED.

THE RESULTS FROM TASK 1) AND 2) WILL BE USED AS INPUT DATA TO THE COMPUTERIZED FINAL DESIGN OF SUBSYSTEMS. BESIDES, TASKS ON THE DATA MONITORING SYSTEM INCLUDE THE DEVELOPMENT OF THE SOFTWARE PACKAGE, AS WELL AS THE SIMULATION OF PERFORMANCE AND MATCHING TO THE DATA LOGGER OF THE DIFFERENT SENSORS, WARNINGS AND CONTROL SYSTEMS USED.